ZALMAN ZM-GWB8800 Ultra/GTX GPU Water Block Block Compatibility: NVIDIA GeForce 8800GTX NVIDIA GeForce 8800Ultra Type: GPU Water Block Block Dim.: 93 x 183 x 31mm Block Material: Water Block Cover / Base: Pure Aluminum Fitting: Brass Tube Dim.: Compatible Tubes(Outer x Inner): 13 x 9mm, 12 x 8mm, 11 x 8mm, 10 x 8mm